== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 09:54:48 (1775224488)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.12083 s, 17.1 MB/s
llite.lustre-ffff98788891c800.read_ahead_stats=clear
llite.lustre-ffff98788891c800.read_ahead_stats=
snapshot_time             1775224508.032614060 secs.nsecs
start_time                1775224496.958949048 secs.nsecs
elapsed_time              11.073665012 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          11 samples [pages]
failed_to_reach_end       1 samples [pages]
failed_to_fast_read       230 samples [pages]
mmap_range_read           225 samples [pages]
readahead_pages           225 samples [pages] 8 128 25370
/usr/bin/fio
thp                     : Memory Advise Huge Page
read_test: (g=0): rw=read, bs=(R) 1024KiB-1024KiB, (W) 1024KiB-1024KiB, (T) 1024KiB-1024KiB, ioengine=mmap, iodepth=1
fio-3.19
Starting 1 process

read_test: (groupid=0, jobs=1): err= 0: pid=227081: Fri Apr  3 10:04:50 2026
  read: IOPS=8, BW=9057KiB/s (9274kB/s)(5120MiB/578870msec)
    clat (msec): min=62, max=561, avg=112.79, stdev=44.62
     lat (msec): min=62, max=561, avg=112.79, stdev=44.62
    clat percentiles (msec):
     |  1.00th=[   69],  5.00th=[   74], 10.00th=[   78], 20.00th=[   82],
     | 30.00th=[   86], 40.00th=[   90], 50.00th=[   96], 60.00th=[  105],
     | 70.00th=[  122], 80.00th=[  144], 90.00th=[  167], 95.00th=[  199],
     | 99.00th=[  292], 99.50th=[  321], 99.90th=[  388], 99.95th=[  397],
     | 99.99th=[  558]
   bw (  KiB/s): min= 1774, max=14336, per=100.00%, avg=9087.67, stdev=2985.70, samples=1150
   iops        : min=    1, max=   14, avg= 8.40, stdev= 3.03, samples=1150
  lat (msec)   : 100=56.11%, 250=42.09%, 500=1.78%, 750=0.02%
  cpu          : usr=0.48%, sys=58.29%, ctx=19045, majf=5277, minf=1305711
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued rwts: total=5120,0,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=1

Run status group 0 (all jobs):
   READ: bw=9057KiB/s (9274kB/s), 9057KiB/s-9057KiB/s (9274kB/s-9274kB/s), io=5120MiB (5369MB), run=578870-578870msec